src/gallium/drivers/r300/r300_screen.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "r300_screen.h"
  24
  25 /* Return the identifier behind whom the brave coders responsible for this
  26  * amalgamation of code, sweat, and duct tape, routinely obscure their names.
  27  *
  28  * ...I should have just put "Corbin Simpson", but I'm not that cool.
  29  *
  30  * (Or egotistical. Yet.) */
  31 static const char* r300_get_vendor(struct pipe_screen* pscreen)
  32 {
  33     return "X.Org R300 Project";
  34 }
  35
  36 static const char* chip_families[] = {
  37     "R300",
  38     "R350",
  39     "R360",
  40     "RV350",
  41     "RV370",
  42     "RV380",
  43     "R420",
  44     "R423",
  45     "R430",
  46     "R480",
  47     "R481",
  48     "RV410",
  49     "RS400",
  50     "RC410",
  51     "RS480",
  52     "RS482",
  53     "RS690",
  54     "RS740",
  55     "RV515",
  56     "R520",
  57     "RV530",
  58     "R580",
  59     "RV560",
  60     "RV570"
  61 };
  62
  63 static const char* r300_get_name(struct pipe_screen* pscreen)
  64 {
  65     struct r300_screen* r300screen = r300_screen(pscreen);
  66
  67     return chip_families[r300screen->caps->family];
  68 }
  69
  70 static int r300_get_param(struct pipe_screen* pscreen, int param)
  71 {
  72     struct r300_screen* r300screen = r300_screen(pscreen);
  73
  74     switch (param) {
  75         /* XXX cases marked "IN THEORY" are possible on the hardware,
  76          * but haven't been implemented yet. */
  77         case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  78             /* XXX I'm told this goes up to 16 */
  79             return 8;
  80         case PIPE_CAP_NPOT_TEXTURES:
  81             /* IN THEORY */
  82             return 0;
  83         case PIPE_CAP_TWO_SIDED_STENCIL:
  84             if (r300screen->caps->is_r500) {
  85                 return 1;
  86             } else {
  87                 return 0;
  88             }
  89             return 0;
  90         case PIPE_CAP_GLSL:
  91             /* IN THEORY */
  92             return 0;
  93         case PIPE_CAP_S3TC:
  94             /* IN THEORY */
  95             return 0;
  96         case PIPE_CAP_ANISOTROPIC_FILTER:
  97             /* IN THEORY */
  98             return 0;
  99         case PIPE_CAP_POINT_SPRITE:
 100             /* IN THEORY */
 101             return 0;
 102         case PIPE_CAP_MAX_RENDER_TARGETS:
 103             return 4;
 104         case PIPE_CAP_OCCLUSION_QUERY:
 105             /* IN THEORY */
 106             return 0;
 107         case PIPE_CAP_TEXTURE_SHADOW_MAP:
 108             /* IN THEORY */
 109             return 0;
 110         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 111             if (r300screen->caps->is_r500) {
 112                 /* 13 == 4096x4096 */
 113                 return 13;
 114             } else {
 115                 /* 12 == 2048x2048 */
 116                 return 12;
 117             }
 118         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 119             /* So, technically, the limit is the same as above, but some math
 120              * shows why this is silly. Assuming RGBA, 4cpp, we can see that
 121              * 4096*4096*4096 = 64.0 GiB exactly, so it's not exactly
 122              * practical. However, if at some point a game really wants this,
 123              * then we can remove or raise this limit. */
 124             if (r300screen->caps->is_r500) {
 125                 /* 9 == 256x256x256 */
 126                 return 9;
 127             } else {
 128                 /* 8 == 128*128*128 */
 129                 return 8;
 130             }
 131         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 132             if (r300screen->caps->is_r500) {
 133                 /* 13 == 4096x4096 */
 134                 return 13;
 135             } else {
 136                 /* 12 == 2048x2048 */
 137                 return 12;
 138             }
 139         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 140             return 1;
 141         case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
 142             return 1;
 143         case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
 144             /* XXX guessing (what a terrible guess) */
 145             return 2;
 146         default:
 147             debug_printf("r300: Implementation error: Bad param %d\n",
 148                 param);
 149             return 0;
 150     }
 151 }
 152
 153 static float r300_get_paramf(struct pipe_screen* pscreen, int param)
 154 {
 155     switch (param) {
 156         case PIPE_CAP_MAX_LINE_WIDTH:
 157         case PIPE_CAP_MAX_LINE_WIDTH_AA:
 158             /* XXX this is the biggest thing that will fit in that register.
 159             * Perhaps the actual rendering limits are less? */
 160             return 10922.0f;
 161         case PIPE_CAP_MAX_POINT_WIDTH:
 162         case PIPE_CAP_MAX_POINT_WIDTH_AA:
 163             /* XXX this is the biggest thing that will fit in that register.
 164              * Perhaps the actual rendering limits are less? */
 165             return 10922.0f;
 166         case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 167             return 16.0f;
 168         case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 169             return 16.0f;
 170         default:
 171             debug_printf("r300: Implementation error: Bad paramf %d\n",
 172                 param);
 173             return 0.0f;
 174     }
 175 }
 176
 177 /* XXX even moar formats */
 178 static boolean check_tex_2d_format(enum pipe_format format)
 179 {
 180     switch (format) {
 181         /* Colorbuffer */
 182         case PIPE_FORMAT_A8R8G8B8_UNORM:
 183         /* Texture */
 184         case PIPE_FORMAT_I8_UNORM:
 185         /* Z buffer */
 186         case PIPE_FORMAT_Z16_UNORM:
 187         /* Z buffer with stencil */
 188         case PIPE_FORMAT_Z24S8_UNORM:
 189             return TRUE;
 190
 191         /* These formats are explicitly not supported, in order to keep
 192          * people from wasting their time trying to implement them... */
 193         case PIPE_FORMAT_S8Z24_UNORM:
 194             return FALSE;
 195
 196         default:
 197             debug_printf("r300: Warning: Got unknown format: %s, in %s\n",
 198                 pf_name(format), __FUNCTION__);
 199             break;
 200     }
 201
 202     return FALSE;
 203 }
 204
 205 /* XXX moar targets */
 206 static boolean r300_is_format_supported(struct pipe_screen* pscreen,
 207                                         enum pipe_format format,
 208                                         enum pipe_texture_target target,
 209                                         unsigned tex_usage,
 210                                         unsigned geom_flags)
 211 {
 212     switch (target) {
 213         case PIPE_TEXTURE_2D:
 214             return check_tex_2d_format(format);
 215         default:
 216             debug_printf("r300: Warning: Got unknown format target: %d\n",
 217                 format);
 218             break;
 219     }
 220
 221     return FALSE;
 222 }
 223
 224 static struct pipe_transfer*
 225 r300_get_tex_transfer(struct pipe_screen *screen,
 226                       struct pipe_texture *texture,
 227                       unsigned face, unsigned level, unsigned zslice,
 228                       enum pipe_transfer_usage usage, unsigned x, unsigned y,
 229                       unsigned w, unsigned h)
 230 {
 231     struct r300_texture *tex = (struct r300_texture *)texture;
 232     struct r300_transfer *trans;
 233     unsigned offset;  /* in bytes */
 234
 235     /* XXX Add support for these things */
 236     if (texture->target == PIPE_TEXTURE_CUBE) {
 237         debug_printf("PIPE_TEXTURE_CUBE is not yet supported.\n");
 238         /* offset = tex->image_offset[level][face]; */
 239     }
 240     else if (texture->target == PIPE_TEXTURE_3D) {
 241         debug_printf("PIPE_TEXTURE_3D is not yet supported.\n");
 242         /* offset = tex->image_offset[level][zslice]; */
 243     }
 244     else {
 245         offset = tex->offset[level];
 246         assert(face == 0);
 247         assert(zslice == 0);
 248     }
 249
 250     trans = CALLOC_STRUCT(r300_transfer);
 251     if (trans) {
 252         trans->transfer.refcount = 1;
 253         pipe_texture_reference(&trans->transfer.texture, texture);
 254         trans->transfer.format = trans->transfer.format;
 255         trans->transfer.width = w;
 256         trans->transfer.height = h;
 257         trans->transfer.block = texture->block;
 258         trans->transfer.nblocksx = texture->nblocksx[level];
 259         trans->transfer.nblocksy = texture->nblocksy[level];
 260         trans->transfer.stride = tex->stride;
 261         trans->transfer.usage = usage;
 262         trans->offset = offset;
 263     }
 264     return &trans->transfer;
 265 }
 266
 267 static void
 268 r300_tex_transfer_release(struct pipe_screen *screen,
 269                           struct pipe_transfer **transfer)
 270 {
 271    struct pipe_transfer *trans = *transfer;
 272
 273    if (--trans->refcount == 0) {
 274       pipe_texture_reference(&trans->texture, NULL);
 275       FREE(trans);
 276    }
 277
 278    *transfer = NULL;
 279 }
 280
 281 static void* r300_transfer_map(struct pipe_screen* screen,
 282                               struct pipe_transfer* transfer)
 283 {
 284     struct r300_texture* tex = (struct r300_texture*)transfer->texture;
 285     char* map;
 286     unsigned flags = 0;
 287
 288     if (transfer->usage != PIPE_TRANSFER_WRITE) {
 289         flags |= PIPE_BUFFER_USAGE_CPU_READ;
 290     }
 291     if (transfer->usage != PIPE_TRANSFER_READ) {
 292         flags |= PIPE_BUFFER_USAGE_CPU_WRITE;
 293     }
 294
 295     map = pipe_buffer_map(screen, tex->buffer, flags);
 296
 297     if (!map) {
 298         return NULL;
 299     }
 300
 301     return map + r300_transfer(transfer)->offset +
 302         transfer->y / transfer->block.height * transfer->stride +
 303         transfer->x / transfer->block.width * transfer->block.size;
 304 }
 305
 306 static void r300_transfer_unmap(struct pipe_screen* screen,
 307                                 struct pipe_transfer* transfer)
 308 {
 309     struct r300_texture* tex = (struct r300_texture*)transfer->texture;
 310     pipe_buffer_unmap(screen, tex->buffer);
 311 }
 312
 313 static void r300_destroy_screen(struct pipe_screen* pscreen)
 314 {
 315     struct r300_screen* r300screen = r300_screen(pscreen);
 316
 317     FREE(r300screen->caps);
 318     FREE(r300screen);
 319 }
 320
 321 struct pipe_screen* r300_create_screen(struct pipe_winsys* winsys,
 322                                        struct r300_winsys* r300_winsys)
 323 {
 324     struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
 325     struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
 326
 327     if (!r300screen || !caps)
 328         return NULL;
 329
 330     caps->pci_id = r300_winsys->pci_id;
 331     caps->num_frag_pipes = r300_winsys->gb_pipes;
 332
 333     r300_parse_chipset(caps);
 334
 335     r300screen->caps = caps;
 336     r300screen->screen.winsys = winsys;
 337     r300screen->screen.destroy = r300_destroy_screen;
 338     r300screen->screen.get_name = r300_get_name;
 339     r300screen->screen.get_vendor = r300_get_vendor;
 340     r300screen->screen.get_param = r300_get_param;
 341     r300screen->screen.get_paramf = r300_get_paramf;
 342     r300screen->screen.is_format_supported = r300_is_format_supported;
 343     r300screen->screen.get_tex_transfer = r300_get_tex_transfer;
 344     r300screen->screen.tex_transfer_release = r300_tex_transfer_release;
 345     r300screen->screen.transfer_map = r300_transfer_map;
 346     r300screen->screen.transfer_unmap = r300_transfer_unmap;
 347
 348     r300_init_screen_texture_functions(&r300screen->screen);
 349     u_simple_screen_init(&r300screen->screen);
 350
 351     return &r300screen->screen;
 352 }